Fair Rent Split: One bedroom is bigger: how much more should they pay?

Everyone says privately what each room is worth to them, and this finds prices where nobody would rather have somebody else's room at somebody else's price. That's a real mathematical property, not a figure of speech, and it shows you the check.

WHAT YOU GET

- Tries every way of handing out the rooms and picks the one that makes everyone happiest

- Then solves for prices nobody envies, which is a shortest-path problem underneath

- Shows the test: for each person, would they swap, and by how much

- Handles up to eight rooms, and says so honestly when the numbers make it impossible

- Because square footage was never what anybody actually cared about

HOW IT WORKS

1. Put in the rent and the rooms: Then everyone splits the whole rent across them, privately.

2. Let it do the hard part: The assignment and the prices come out together.

3. Check nobody would swap: Every person, against every other room, shown on screen.

One file. Double-click it and it opens in the browser you already have: Chrome, Edge, Safari or Firefox. Nothing to install, no account, no subscription.

Nothing you type ever leaves your computer. There is no server involved, which is why it still works with the wi-fi switched off.

30-day refund, no questions asked.